PT-2026-47844

Name of the Vulnerable Software and Affected Versions OpenSSL version 4.0 OpenSSL version 3.6 OpenSSL version 3.5 OpenSSL version 3.4 OpenSSL version 3.0 OpenSSL version 1.1.1 OpenSSL version 1.0.2 Description A use-after-free condition occurs during PKCS7 signature verification when processing a...

CVE-2026-0819

A stack buffer overflow vulnerability exists in wolfSSL's PKCS7 SignedData encoding functionality. In wcPKCS7BuildSignedAttributes, when adding custom signed attributes, the code passes an incorrect capacity value esd-signedAttribsCount to EncodeAttributes instead of the remaining available space...

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap overflow when handling DER-encoded DSA or RSA-PSS signatures. Applications using NSS for handling signatures encoded within CMS S/MIME PKCS \#7 or PKCS \#12 are likely to be impacted. Applications using NSS for certificate validation or other TLS X.509 OCSP or CRL functionality may be impacted depending on how they configure NSS. *Note: This vulnerability does NOT impact Mozilla Firefox.* However email clients and PDF viewers that use NSS for signature verification such as Thunderbird LibreOffice Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

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openssl: CMS and PKCS#7 Bleichenbacher attack

The implementation of Cryptographic Message Syntax CMS and PKCS 7 in OpenSSL before 0.9.8u and 1.x before 1.0.0h does not properly restrict certain oracle behavior, which makes it easier for context-dependent attackers to decrypt data via a Million Message Attack MMA adaptive chosen ciphertext...